v1.4.6
* Added `iwsha256()` SHA-256 hash implementation (iwsha2.h) * Added single thread worker (iwstw.h) * Added `iwstree_clear()` (iwstree.h)
* Added `iwsha256()` SHA-256 hash implementation (iwsha2.h) * Added single thread worker (iwstw.h) * Added `iwstree_clear()` (iwstree.h)